coverage report (lcov/html) fix -- fixes #618

Author: objctp

src/coverage.sh

@@ -778,7 +778,7 @@ function bashunit::coverage::report_lcov() {
       local line
       # shellcheck disable=SC2094
       while IFS= read -r line || [ -n "$line" ]; do
-        ((lineno++))
+        ((++lineno))
         bashunit::coverage::is_executable_line "$line" "$lineno" || continue
         echo "DA:${lineno},$(bashunit::coverage::get_line_hits "$file" "$lineno")"
       done <"$file"
@@ -1543,10 +1543,10 @@ EOF
           local ln_content
           ln_content=$(sed -n "${ln}p" "$file" 2>/dev/null) || continue
           if bashunit::coverage::is_executable_line "$ln_content" "$ln"; then
-            ((fn_executable++))
+            ((++fn_executable))
             local ln_hits=${hits_by_line[$ln]:-0}
             if [ "$ln_hits" -gt 0 ]; then
-              ((fn_hit++))
+              ((++fn_hit))
             fi
           fi
         done
@@ -1597,7 +1597,7 @@ EOF
     local lineno=0
     local line
     while IFS= read -r line || [ -n "$line" ]; do
-      ((lineno++))
+      ((++lineno))
 
       local escaped_line
       escaped_line=$(bashunit::coverage::html_escape "$line")